Process of making piston rings



J. BARKER.

PROCESS OF MAKING PISTON RI APPLICATION FILED OCT. 18 19! Patented Jan. 24,1922. 1 2 SHhETSSHEET I.

I. BARKER.

PROCESS OF MAKING PISTON RINGS.

APPLICATION FILED OCT- I8. 191

Patented Jan. 24, 1922.

2 SHEETSSHEET 2.

JAMES BARKER, 0F PHILADELPHIA. PENNSYLVANIA, AESIGNOR '10 MARY EMMA BARKER, 0F RYDAL, PENNSYLVANIA.

PROCESS OF MAKING PISTON RINGS.

Specification of Letters Patent.

Patented Jan. 241, 1922.

Application filed October 18, 1917. Serial No. 197,231.

To all whom it may concern:

Be it known that I, JAMES BARKER, a citizen of the United States. residing in Philadelphia, Pennsylvania. have invented certain Improvements in a Process of Making Piston Rings, of which the following is a specification.

This invention relates to an improved process of making cast metal rings for use particularly in internal combustion engines, although it will be understood that they can be used on pistons of other engines and pumps.

One object of my invention is to insure the casting of a perfect ring withoutblow holes, and one in which the metal is free from impurities.

A still further object of the invention is to cast the ring so that the skin on the inner surface of the ring need not be removed in finishing the ring so as to utilize the elastic properties of the skin surface of the finished ring.

In the accompanying drawings:

Fig. 1 is a sectional view through a mold, showing the casting after pouring;

Fig. 2 is a planview of the casting removed from the mold;

Fig. 3 is a longitudinal sectional view on the line 3-3, Fig. 2;

F ig. 4 is a detached perspective view of the ring in the rough with a portion of the gate attached; and I Fig. 5 is a side view of the finished ring.

Referring to the drawings, 1 is the mold mounted in the ordinary flask and consisting of the drag 2, cope 3, and the bottom board 4. 5, 5 are the rings made in a series on either side of a feeder well in which the It will be noticed that the main portion of the gates S is flat and is about the width of a ring, being increased in height at the pomt 9 where it joins the rings, so that if any bubbles, or air traps. should form they will form in the enlarged portions 9 of the gate and not in the ring itself. The gates are all contracted laterally at 9 so as to allow the gates to be broken at a point near the ring.

I preferably connect the gates with the rings midway of the height, as shown in Fig. 1. and I also connect the rings at the bottom by a web 10, which eventually forms the enlarged portion 10 of the finished ring 5*, Fig. 5. After the casting is made, the rings are separated by breaking the gates and the webs between the several rings so that a single casting has the appearance of that shown in Fig. l. The ring made in this manner is finished by trueing the surface 11 and the edges 12, but the interior surface 14 of the ring is left with the hard skin formed by the casting. By allowing this skin to remain on the interior of the ring, the ring has more elasticity, than if the skin were removed.

By my improved method of making the rings. they can be made more rapidly than heretofore, and with fewer defects. When the ring is finished. there will be no blow holes. to any appreciable extent. in the ring.

I claim:

The process herein described of making piston and like rings. said process consisting in casting a series of rings on edge, with a gate at the side of each ring, each gate being enlarged at the ring and connected to a common feeder'well, pouring the metal through the well and gates into the mold cavities allowing any air bubbles to form in the enlargements of the gate, then removing the casting from the mold and detaching the rings from the metal of the gate.

In Witness whereof I afiix my signature.

JAMES BARKER. 

